Add unit tests

Author: rauhma

SConstruct

@@ -3,6 +3,7 @@ import fsenv
 
 DIRECTORIES = [
     'src',
+    'test',
     'components/rotatable' ]
 
 TARGET_DEFINES = {

scripts/run-unittests.sh

@@ -1,4 +1,114 @@
 #!/usr/bin/env bash
 
-# all's well that ends well
-exit 0
+main () {
+    cd "$(dirname "$(realpath "$0")")/.."
+    if [ -n "$FSARCHS" ]; then
+        local archs=()
+        IFS=, read -ra archs <<< "$FSARCHS"
+        for arch in "${archs[@]}" ; do
+            run-tests "$arch" "$@"
+        done
+    else
+        local os=$(uname -m -s)
+        case $os in
+            "Darwin arm64")
+                run-tests darwin "$@";;
+            "Darwin x86_64")
+                run-tests darwin "$@";;
+            "FreeBSD amd64")
+                run-tests freebsd_amd64 "$@";;
+            "Linux i686")
+                run-tests linux32 "$@";;
+            "Linux x86_64")
+                run-tests linux64 "$@";;
+            "Linux aarch64")
+                run-tests linux_arm64 "$@";;
+            "OpenBSD amd64")
+                run-tests openbsd_amd64 "$@";;
+            *)
+                echo "$0: Unknown OS architecture: $os" >&2
+                exit 1
+        esac
+    fi
+}
+
+realpath () {
+    if [ -x /bin/realpath ]; then
+        /bin/realpath "$@"
+    else
+        # reimplementation of "readlink -fv" for OSX
+        python -c "import os.path, sys; print(os.path.realpath(sys.argv[1]))" \
+               "$1"
+    fi
+}
+
+run-tests () {
+    local arch=$1
+    shift &&
+    echo &&
+    echo Start Tests on $arch &&
+    echo &&
+    rm -rf stage/$arch/workdir &&
+    mkdir stage/$arch/workdir &&
+    if [ "$arch" = openbsd_amd64 ]; then
+        stage/$arch/build/test/testrot stage/$arch/workdir
+        return
+    fi
+    # The generated .gcda and .gcno files are not rewritten on
+    # rebuild, which leads to errors and/or bad stats. I don't know a
+    # better way around the problem but to get rid of the whole target
+    # directory each time:
+    rm -rf stage/$arch/test &&
+    mkdir -p stage/$arch/test/gcov &&
+    if ! FSCCFLAGS="-fprofile-arcs -ftest-coverage -O0" \
+         FSLINKFLAGS="-fprofile-arcs" \
+         ${SCONS:-scons} builddir=test "$@"; then
+        echo "Did you forget to specify prefix=<prefix> to $0?" >&2
+        false
+    fi &&
+    stage/$arch/test/test/testrot stage/$arch/workdir &&
+    test-coverage $arch
+}
+
+test-coverage () {
+    local arch=$1
+    echo &&
+    echo Test Coverage &&
+    echo ============= &&
+    echo &&
+    find src -name \*.c |
+    while read src; do
+        ${GCOV:-gcov} -p -o "stage/$arch/test/$(dirname "$src")" "$src" || exit
+    done >stage/$arch/test/gcov/gcov.out 2>stage/$arch/test/gcov/gcov.err &&
+    pretty-print-out <stage/$arch/test/gcov/gcov.out &&
+    pretty-print-err <stage/$arch/test/gcov/gcov.err &&
+    mv *.gcov stage/$arch/test/gcov/ &&
+    echo
+}
+
+pretty-print-out () {
+    while read line1; do
+        read line2
+        read line3
+        read line4
+        f=$(sed "s/^File .\\([^']*\\)'$/\\1/" <<<"$line1")
+        if [[ "$f" =~ \.h$ ]]; then
+            continue
+        fi
+        case "$line2" in
+            "No executable lines")
+                ;;
+            "Lines executed:"*)
+                p=$(sed 's/Lines executed:\([0-9.]*\)% .*$/\1/' <<<"$line2")
+                printf "%6s%% %s\n" "$p" "$f"
+                ;;
+        esac
+    done
+}
+
+pretty-print-err () {
+    grep 'gcda:cannot open data file' |
+    sed 's!^stage/[^/]*/test/\([^:]*\).gcda:cannot open data file.*!  0.00% \1.c!'
+}
+
+main "$@"

test/SConscript

@@ -0,0 +1,20 @@
+Import('env')
+
+env['CCFLAGS'] += ' -O0'
+
+env['CPPPATH'] = [
+    '../components/rotatable/include'
+]
+
+env['LIBPATH'] = [
+    '../src'
+]
+
+env['LIBS'] = [
+    'rotatable'
+]
+
+env.ParseConfig(env['CONFIG_PARSER'])
+
+env.Program('testrot',
+            [ 'testrot.c' ])